Plant Flow Cytometry

Dear All:
I'm writing this message to try to get in contact with anybody who has had
experience in measuring Plant DNA content using flow cytometry. I need to do
this kind of measurements for my graduation thesis, and i have access to a
flow cytometer, but i haven't had any results. Nobody here (Costa Rica ) has
experience with this, so i don't know what to do. I think i have an idea about
what's happenning, but there is nothing helpful in the literature available.
I REALLY would appreciate any kind of help.
Thank You.
Alfonso J. Garcia-Pi/eres.
agarcia at cariari.ucr.ac.cr